Optical film, method for producing the same and polarizing...

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C264S208000

Reexamination Certificate

active

07964127

ABSTRACT:
A method for producing an optical film comprising the steps of: (i) melt casting a cellulose ester resin or a cycloolefin resin by extruding melt of the cellulose ester resin or the cycloolefin resin from a die onto a roll-shaped cooling drum; (ii) cooling and solidifying the extruded melt to form a film; (iii) stretching the film in a lateral direction of the film; and (iv) winding the film in a roll, wherein the cooling drum has plural regions divided predeterminedly in an axis direction of the cooling drum, a temperature of each region being independently controlled.

REFERENCES:
patent: 6474402 (2002-11-01), Sauer et al.
patent: 2005/0003939 (2005-01-01), Womer et al.
patent: 2005/0077648 (2005-04-01), Sugiura
patent: 2005/0150426 (2005-07-01), Hashimoto et al.
patent: 5-293884 (1993-11-01), None
patent: 6-270227 (1994-09-01), None
patent: 10-10321 (1998-01-01), None
patent: 11-10728 (1999-01-01), None
patent: 2002-212312 (2002-07-01), None
patent: 2003-236915 (2003-08-01), None
patent: 2003-305765 (2003-10-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optical film, method for producing the same and polarizing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical film, method for producing the same and polarizing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical film, method for producing the same and polarizing... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2738674

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.